The bulk of the data at the NCEDC consists of waveform and GPS data from
northern California.
Figure 11.1 shows the relative proportion of
each data set at the NCEDC.
The total size of the datasets archived at the NCEDC is shown in Table
11.1.
Figure 11.2 shows the geographic
distribution of data archived by the NCEDC.

Figure 11.1:
Chart showing the relative proportion of each data set
at the NCEDC.

Figure 11.2:
Map showing the location of stations whose data are archived
at the NCEDC. Circles are seismic sites;
squares are GPS sites; and diamonds are the locations
of USGS Low-frequency experiments.